import {getStyle} from '@/utils/mUtils'

export const loadMore = {
  directives: {
    'load-more': {
      bind: (el, binding) => {
        let windowHeight = window.screen.height;
        let height;
        let setTop;
        let paddingBottom;
        let marginBottom;
        let requestFram;
        let oldScrollTop;
        let scrollEl;
        let heightEl;
        let scrollType = el.attributes.type && el.attributes.type.value;
        let scrollReduce = 2;
        if (scrollType == 2){
          scrollEl = el;
          heightEl = el.children[0];
        }else {
          scrollEl = document.body;
          heightEl = el;
        }

        el.addEventListener('touchstart', () =>{
          height = heightEl.clientHeight;
          if (scrollType == 2){
            height = height;
          }
          setTop = el.offsetTop;
          paddingBottom = getStyle(el, 'paddingBottom');
          marginBottom = getStyle(el,marginBottom);
        },false)

        el.addEventListener('touchmove', ()=>{
          loadMore();
        },false)

        el.addEventListener('touchend', ()=>{
          oldScrollTop = scrollEl.scrollTop;

        },false)

        const moveEnd = () => {
          requestFram = requestAnimationFrame(() => {
            if (scrollEl.scrollTop != oldScrollTop) {
              oldScrollTop = scrollEl.scrollTop;
              moveEnd()
            } else {
              cancelAnimationFrame(requestFram);
              height = heightEl.clientHeight;
              loadMore();
            }
          })
        }

        const loadMore = () => {
          if (scrollEl.scrollTop + windowHeight >= height + setTop + paddingBottom + marginBottom - scrollReduce) {
            binding.value();
          }
        }

      }
    }
  }
};

export const getImgPath  = {
  methods: {
    getImgPath(path){
      let  suffix;
      if (!path){
        return '//elm.cangdu.org/img/defauil.jpg'
      }

      if (path.indexOf('jpeg') !== -1){
        suffix = '.jpeg'
      }else {
        suffix = '.png'
      }

      let url = '/' + path.substr(0,1) + '/' + path.substr(1,2)  + '/' + path.substr(3) + suffix;
      return 'https://fuss10.elemecdn.com' + url
    }
  }
}
